/* Dynamic architecture support for GDB, the GNU debugger.
- Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
- Foundation, Inc.
+ Copyright (C) 1998-2015 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "arch-utils.h"
#include "buildsym.h"
#include "gdbcmd.h"
-#include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
-#include "gdb_string.h"
+#include "inferior.h" /* enum CALL_DUMMY_LOCATION et al. */
+#include "infrun.h"
#include "regcache.h"
-#include "gdb_assert.h"
#include "sim-regno.h"
#include "gdbcore.h"
#include "osabi.h"
+#include "target-descriptions.h"
+#include "objfiles.h"
+#include "language.h"
+#include "symtab.h"
#include "version.h"
#include "floatformat.h"
-/* Implementation of extract return value that grubs around in the
- register cache. */
-void
-legacy_extract_return_value (struct type *type, struct regcache *regcache,
- void *valbuf)
+
+struct displaced_step_closure *
+simple_displaced_step_copy_insn (struct gdbarch *gdbarch,
+ CORE_ADDR from, CORE_ADDR to,
+ struct regcache *regs)
{
- char *registers = deprecated_grub_regcache_for_registers (regcache);
- bfd_byte *buf = valbuf;
- DEPRECATED_EXTRACT_RETURN_VALUE (type, registers, buf); /* OK */
+ size_t len = gdbarch_max_insn_length (gdbarch);
+ gdb_byte *buf = xmalloc (len);
+
+ read_memory (from, buf, len);
+ write_memory (to, buf, len);
+
+ if (debug_displaced)
+ {
+ fprintf_unfiltered (gdb_stdlog, "displaced: copy %s->%s: ",
+ paddress (gdbarch, from), paddress (gdbarch, to));
+ displaced_step_dump_bytes (gdb_stdlog, buf, len);
+ }
+
+ return (struct displaced_step_closure *) buf;
}
-/* Implementation of store return value that grubs the register cache.
- Takes a local copy of the buffer to avoid const problems. */
+
void
-legacy_store_return_value (struct type *type, struct regcache *regcache,
- const void *buf)
+simple_displaced_step_free_closure (struct gdbarch *gdbarch,
+ struct displaced_step_closure *closure)
{
- bfd_byte *b = alloca (TYPE_LENGTH (type));
- gdb_assert (regcache == current_regcache);
- memcpy (b, buf, TYPE_LENGTH (type));
- DEPRECATED_STORE_RETURN_VALUE (type, b);
+ xfree (closure);
}
int
-always_use_struct_convention (int gcc_p, struct type *value_type)
+default_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
+ struct displaced_step_closure *closure)
{
- return 1;
+ return !gdbarch_software_single_step_p (gdbarch);
}
-enum return_value_convention
-legacy_return_value (struct gdbarch *gdbarch, struct type *valtype,
- struct regcache *regcache, void *readbuf,
- const void *writebuf)
+CORE_ADDR
+displaced_step_at_entry_point (struct gdbarch *gdbarch)
{
- /* NOTE: cagney/2004-06-13: The gcc_p parameter to
- USE_STRUCT_CONVENTION isn't used. */
- int struct_return = ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
- || TYPE_CODE (valtype) == TYPE_CODE_UNION
- || TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
- && DEPRECATED_USE_STRUCT_CONVENTION (0, valtype));
+ CORE_ADDR addr;
+ int bp_len;
- if (writebuf != NULL)
- {
- gdb_assert (!struct_return);
- /* NOTE: cagney/2004-06-13: See stack.c:return_command. Old
- architectures don't expect STORE_RETURN_VALUE to handle small
- structures. Should not be called with such types. */
- gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_STRUCT
- && TYPE_CODE (valtype) != TYPE_CODE_UNION);
- STORE_RETURN_VALUE (valtype, regcache, writebuf);
- }
+ addr = entry_point_address ();
- if (readbuf != NULL)
- {
- gdb_assert (!struct_return);
- EXTRACT_RETURN_VALUE (valtype, regcache, readbuf);
- }
+ /* Inferior calls also use the entry point as a breakpoint location.
+ We don't want displaced stepping to interfere with those
+ breakpoints, so leave space. */
+ gdbarch_breakpoint_from_pc (gdbarch, &addr, &bp_len);
+ addr += bp_len * 2;
- if (struct_return)
- return RETURN_VALUE_STRUCT_CONVENTION;
- else
- return RETURN_VALUE_REGISTER_CONVENTION;
+ return addr;
}
int
-legacy_register_sim_regno (int regnum)
+legacy_register_sim_regno (struct gdbarch *gdbarch, int regnum)
{
/* Only makes sense to supply raw registers. */
- gdb_assert (regnum >= 0 && regnum < NUM_REGS);
+ gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
/* NOTE: cagney/2002-05-13: The old code did it this way and it is
suspected that some GDB/SIM combinations may rely on this
behavour. The default should be one2one_register_sim_regno
(below). */
- if (REGISTER_NAME (regnum) != NULL
- && REGISTER_NAME (regnum)[0] != '\0')
+ if (gdbarch_register_name (gdbarch, regnum) != NULL
+ && gdbarch_register_name (gdbarch, regnum)[0] != '\0')
return regnum;
else
return LEGACY_SIM_REGNO_IGNORE;
}
CORE_ADDR
-generic_skip_trampoline_code (CORE_ADDR pc)
+generic_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
return 0;
}
}
int
-generic_in_solib_return_trampoline (CORE_ADDR pc, char *name)
+generic_in_solib_return_trampoline (struct gdbarch *gdbarch,
+ CORE_ADDR pc, const char *name)
{
return 0;
}
int
-generic_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
+generic_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
return 0;
}
-void
-generic_remote_translate_xfer_address (struct gdbarch *gdbarch,
- struct regcache *regcache,
- CORE_ADDR gdb_addr, int gdb_len,
- CORE_ADDR * rem_addr, int *rem_len)
-{
- *rem_addr = gdb_addr;
- *rem_len = gdb_len;
-}
-
-/* Helper functions for INNER_THAN */
+/* Helper functions for gdbarch_inner_than */
int
core_addr_lessthan (CORE_ADDR lhs, CORE_ADDR rhs)
return (lhs > rhs);
}
-
-/* Helper functions for TARGET_{FLOAT,DOUBLE}_FORMAT */
-
-const struct floatformat *
-default_float_format (struct gdbarch *gdbarch)
-{
- int byte_order = gdbarch_byte_order (gdbarch);
- switch (byte_order)
- {
- case BFD_ENDIAN_BIG:
- return &floatformat_ieee_single_big;
- case BFD_ENDIAN_LITTLE:
- return &floatformat_ieee_single_little;
- default:
- internal_error (__FILE__, __LINE__,
- _("default_float_format: bad byte order"));
- }
-}
-
-
-const struct floatformat *
-default_double_format (struct gdbarch *gdbarch)
-{
- int byte_order = gdbarch_byte_order (gdbarch);
- switch (byte_order)
- {
- case BFD_ENDIAN_BIG:
- return &floatformat_ieee_double_big;
- case BFD_ENDIAN_LITTLE:
- return &floatformat_ieee_double_little;
- default:
- internal_error (__FILE__, __LINE__,
- _("default_double_format: bad byte order"));
- }
-}
-
-/* Misc helper functions for targets. */
+/* Misc helper functions for targets. */
CORE_ADDR
-core_addr_identity (CORE_ADDR addr)
+core_addr_identity (struct gdbarch *gdbarch, CORE_ADDR addr)
{
return addr;
}
}
int
-no_op_reg_to_regnum (int reg)
+no_op_reg_to_regnum (struct gdbarch *gdbarch, int reg)
{
return reg;
}
void
-default_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
+default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
{
return;
}
+/* See arch-utils.h. */
+
void
-default_coff_make_msymbol_special (int val, struct minimal_symbol *msym)
+default_make_symbol_special (struct symbol *sym, struct objfile *objfile)
{
return;
}
+/* See arch-utils.h. */
+
+CORE_ADDR
+default_adjust_dwarf2_addr (CORE_ADDR pc)
+{
+ return pc;
+}
+
+/* See arch-utils.h. */
+
+CORE_ADDR
+default_adjust_dwarf2_line (CORE_ADDR addr, int rel)
+{
+ return addr;
+}
+
int
-cannot_register_not (int regnum)
+cannot_register_not (struct gdbarch *gdbarch, int regnum)
{
return 0;
}
/* Legacy version of target_virtual_frame_pointer(). Assumes that
- there is an DEPRECATED_FP_REGNUM and that it is the same, cooked or
- raw. */
+ there is an gdbarch_deprecated_fp_regnum and that it is the same,
+ cooked or raw. */
void
-legacy_virtual_frame_pointer (CORE_ADDR pc,
+legacy_virtual_frame_pointer (struct gdbarch *gdbarch,
+ CORE_ADDR pc,
int *frame_regnum,
LONGEST *frame_offset)
{
register and an offset can determine this. I think it should
instead generate a byte code expression as that would work better
with things like Dwarf2's CFI. */
- if (DEPRECATED_FP_REGNUM >= 0 && DEPRECATED_FP_REGNUM < NUM_REGS)
- *frame_regnum = DEPRECATED_FP_REGNUM;
- else if (SP_REGNUM >= 0 && SP_REGNUM < NUM_REGS)
- *frame_regnum = SP_REGNUM;
+ if (gdbarch_deprecated_fp_regnum (gdbarch) >= 0
+ && gdbarch_deprecated_fp_regnum (gdbarch)
+ < gdbarch_num_regs (gdbarch))
+ *frame_regnum = gdbarch_deprecated_fp_regnum (gdbarch);
+ else if (gdbarch_sp_regnum (gdbarch) >= 0
+ && gdbarch_sp_regnum (gdbarch)
+ < gdbarch_num_regs (gdbarch))
+ *frame_regnum = gdbarch_sp_regnum (gdbarch);
else
/* Should this be an internal error? I guess so, it is reflecting
an architectural limitation in the current design. */
- internal_error (__FILE__, __LINE__, _("No virtual frame pointer available"));
+ internal_error (__FILE__, __LINE__,
+ _("No virtual frame pointer available"));
*frame_offset = 0;
}
-/* Assume the world is sane, every register's virtual and real size
- is identical. */
-
-int
-generic_register_size (int regnum)
-{
- gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
- return TYPE_LENGTH (gdbarch_register_type (current_gdbarch, regnum));
-}
-
-/* Assume all registers are adjacent. */
-
+\f
int
-generic_register_byte (int regnum)
+generic_convert_register_p (struct gdbarch *gdbarch, int regnum,
+ struct type *type)
{
- int byte;
- int i;
- gdb_assert (regnum >= 0 && regnum < NUM_REGS + NUM_PSEUDO_REGS);
- byte = 0;
- for (i = 0; i < regnum; i++)
- {
- byte += generic_register_size (i);
- }
- return byte;
+ return 0;
}
-\f
int
-legacy_pc_in_sigtramp (CORE_ADDR pc, char *name)
+default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
{
-#if defined (DEPRECATED_IN_SIGTRAMP)
- return DEPRECATED_IN_SIGTRAMP (pc, name);
-#else
- return name && strcmp ("_sigtramp", name) == 0;
-#endif
+ return 0;
}
int
-generic_convert_register_p (int regnum, struct type *type)
+generic_instruction_nullified (struct gdbarch *gdbarch,
+ struct regcache *regcache)
{
return 0;
}
int
-default_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
+default_remote_register_number (struct gdbarch *gdbarch,
+ int regno)
{
- if (DEPRECATED_REG_STRUCT_HAS_ADDR_P ()
- && DEPRECATED_REG_STRUCT_HAS_ADDR (processing_gcc_compilation, type))
- {
- CHECK_TYPEDEF (type);
-
- return (TYPE_CODE (type) == TYPE_CODE_STRUCT
- || TYPE_CODE (type) == TYPE_CODE_UNION
- || TYPE_CODE (type) == TYPE_CODE_SET
- || TYPE_CODE (type) == TYPE_CODE_BITSTRING);
- }
-
- return 0;
+ return regno;
}
+/* See arch-utils.h. */
+
int
-generic_instruction_nullified (struct gdbarch *gdbarch,
- struct regcache *regcache)
+default_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
{
return 0;
}
\f
/* Functions to manipulate the endianness of the target. */
-/* ``target_byte_order'' is only used when non- multi-arch.
- Multi-arch targets obtain the current byte order using the
- TARGET_BYTE_ORDER gdbarch method.
-
- The choice of initial value is entirely arbitrary. During startup,
- the function initialize_current_architecture() updates this value
- based on default byte-order information extracted from BFD. */
-static int target_byte_order = BFD_ENDIAN_BIG;
-static int target_byte_order_auto = 1;
-
-enum bfd_endian
-selected_byte_order (void)
-{
- if (target_byte_order_auto)
- return BFD_ENDIAN_UNKNOWN;
- else
- return target_byte_order;
-}
+static int target_byte_order_user = BFD_ENDIAN_UNKNOWN;
static const char endian_big[] = "big";
static const char endian_little[] = "little";
static const char endian_auto[] = "auto";
-static const char *endian_enum[] =
+static const char *const endian_enum[] =
{
endian_big,
endian_little,
};
static const char *set_endian_string;
+enum bfd_endian
+selected_byte_order (void)
+{
+ return target_byte_order_user;
+}
+
/* Called by ``show endian''. */
static void
-show_endian (char *args, int from_tty)
+show_endian (struct ui_file *file, int from_tty, struct cmd_list_element *c,
+ const char *value)
{
- if (target_byte_order_auto)
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- printf_unfiltered (_("The target endianness is set automatically "
- "(currently big endian)\n"));
+ if (target_byte_order_user == BFD_ENDIAN_UNKNOWN)
+ if (gdbarch_byte_order (get_current_arch ()) == BFD_ENDIAN_BIG)
+ fprintf_unfiltered (file, _("The target endianness is set automatically "
+ "(currently big endian)\n"));
else
- printf_unfiltered (_("The target endianness is set automatically "
- "(currently little endian)\n"));
- else
- if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
- printf_unfiltered ("The target is assumed to be big endian\n");
+ fprintf_unfiltered (file, _("The target endianness is set automatically "
+ "(currently little endian)\n"));
else
- printf_unfiltered ("The target is assumed to be little endian\n");
+ if (target_byte_order_user == BFD_ENDIAN_BIG)
+ fprintf_unfiltered (file,
+ _("The target is assumed to be big endian\n"));
+ else
+ fprintf_unfiltered (file,
+ _("The target is assumed to be little endian\n"));
}
static void
set_endian (char *ignore_args, int from_tty, struct cmd_list_element *c)
{
+ struct gdbarch_info info;
+
+ gdbarch_info_init (&info);
+
if (set_endian_string == endian_auto)
{
- target_byte_order_auto = 1;
+ target_byte_order_user = BFD_ENDIAN_UNKNOWN;
+ if (! gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("set_endian: architecture update failed"));
}
else if (set_endian_string == endian_little)
{
- struct gdbarch_info info;
- target_byte_order_auto = 0;
- gdbarch_info_init (&info);
info.byte_order = BFD_ENDIAN_LITTLE;
if (! gdbarch_update_p (info))
printf_unfiltered (_("Little endian target not supported by GDB\n"));
+ else
+ target_byte_order_user = BFD_ENDIAN_LITTLE;
}
else if (set_endian_string == endian_big)
{
- struct gdbarch_info info;
- target_byte_order_auto = 0;
- gdbarch_info_init (&info);
info.byte_order = BFD_ENDIAN_BIG;
if (! gdbarch_update_p (info))
printf_unfiltered (_("Big endian target not supported by GDB\n"));
+ else
+ target_byte_order_user = BFD_ENDIAN_BIG;
}
else
internal_error (__FILE__, __LINE__,
_("set_endian: bad value"));
- show_endian (NULL, from_tty);
+
+ show_endian (gdb_stdout, from_tty, NULL, NULL);
+}
+
+/* Given SELECTED, a currently selected BFD architecture, and
+ TARGET_DESC, the current target description, return what
+ architecture to use.
+
+ SELECTED may be NULL, in which case we return the architecture
+ associated with TARGET_DESC. If SELECTED specifies a variant
+ of the architecture associtated with TARGET_DESC, return the
+ more specific of the two.
+
+ If SELECTED is a different architecture, but it is accepted as
+ compatible by the target, we can use the target architecture.
+
+ If SELECTED is obviously incompatible, warn the user. */
+
+static const struct bfd_arch_info *
+choose_architecture_for_target (const struct target_desc *target_desc,
+ const struct bfd_arch_info *selected)
+{
+ const struct bfd_arch_info *from_target = tdesc_architecture (target_desc);
+ const struct bfd_arch_info *compat1, *compat2;
+
+ if (selected == NULL)
+ return from_target;
+
+ if (from_target == NULL)
+ return selected;
+
+ /* struct bfd_arch_info objects are singletons: that is, there's
+ supposed to be exactly one instance for a given machine. So you
+ can tell whether two are equivalent by comparing pointers. */
+ if (from_target == selected)
+ return selected;
+
+ /* BFD's 'A->compatible (A, B)' functions return zero if A and B are
+ incompatible. But if they are compatible, it returns the 'more
+ featureful' of the two arches. That is, if A can run code
+ written for B, but B can't run code written for A, then it'll
+ return A.
+
+ Some targets (e.g. MIPS as of 2006-12-04) don't fully
+ implement this, instead always returning NULL or the first
+ argument. We detect that case by checking both directions. */
+
+ compat1 = selected->compatible (selected, from_target);
+ compat2 = from_target->compatible (from_target, selected);
+
+ if (compat1 == NULL && compat2 == NULL)
+ {
+ /* BFD considers the architectures incompatible. Check our
+ target description whether it accepts SELECTED as compatible
+ anyway. */
+ if (tdesc_compatible_p (target_desc, selected))
+ return from_target;
+
+ warning (_("Selected architecture %s is not compatible "
+ "with reported target architecture %s"),
+ selected->printable_name, from_target->printable_name);
+ return selected;
+ }
+
+ if (compat1 == NULL)
+ return compat2;
+ if (compat2 == NULL)
+ return compat1;
+ if (compat1 == compat2)
+ return compat1;
+
+ /* If the two didn't match, but one of them was a default
+ architecture, assume the more specific one is correct. This
+ handles the case where an executable or target description just
+ says "mips", but the other knows which MIPS variant. */
+ if (compat1->the_default)
+ return compat2;
+ if (compat2->the_default)
+ return compat1;
+
+ /* We have no idea which one is better. This is a bug, but not
+ a critical problem; warn the user. */
+ warning (_("Selected architecture %s is ambiguous with "
+ "reported target architecture %s"),
+ selected->printable_name, from_target->printable_name);
+ return selected;
}
-/* Functions to manipulate the architecture of the target */
+/* Functions to manipulate the architecture of the target. */
enum set_arch { set_arch_auto, set_arch_manual };
-static int target_architecture_auto = 1;
+static const struct bfd_arch_info *target_architecture_user;
static const char *set_architecture_string;
const char *
selected_architecture_name (void)
{
- if (target_architecture_auto)
+ if (target_architecture_user == NULL)
return NULL;
else
return set_architecture_string;
}
/* Called if the user enters ``show architecture'' without an
- argument. */
+ argument. */
static void
-show_architecture (char *args, int from_tty)
+show_architecture (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
{
- const char *arch;
- arch = TARGET_ARCHITECTURE->printable_name;
- if (target_architecture_auto)
- printf_filtered (_("The target architecture is set automatically (currently %s)\n"), arch);
+ if (target_architecture_user == NULL)
+ fprintf_filtered (file, _("The target architecture is set "
+ "automatically (currently %s)\n"),
+ gdbarch_bfd_arch_info (get_current_arch ())->printable_name);
else
- printf_filtered (_("The target architecture is assumed to be %s\n"), arch);
+ fprintf_filtered (file, _("The target architecture is assumed to be %s\n"),
+ set_architecture_string);
}
/* Called if the user enters ``set architecture'' with or without an
- argument. */
+ argument. */
static void
set_architecture (char *ignore_args, int from_tty, struct cmd_list_element *c)
{
+ struct gdbarch_info info;
+
+ gdbarch_info_init (&info);
+
if (strcmp (set_architecture_string, "auto") == 0)
{
- target_architecture_auto = 1;
+ target_architecture_user = NULL;
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("could not select an architecture automatically"));
}
else
{
- struct gdbarch_info info;
- gdbarch_info_init (&info);
info.bfd_arch_info = bfd_scan_arch (set_architecture_string);
if (info.bfd_arch_info == NULL)
internal_error (__FILE__, __LINE__,
_("set_architecture: bfd_scan_arch failed"));
if (gdbarch_update_p (info))
- target_architecture_auto = 0;
+ target_architecture_user = info.bfd_arch_info;
else
printf_unfiltered (_("Architecture `%s' not recognized.\n"),
set_architecture_string);
}
- show_architecture (NULL, from_tty);
+ show_architecture (gdb_stdout, from_tty, NULL, NULL);
}
/* Try to select a global architecture that matches "info". Return
- non-zero if the attempt succeds. */
+ non-zero if the attempt succeeds. */
int
gdbarch_update_p (struct gdbarch_info info)
{
- struct gdbarch *new_gdbarch = gdbarch_find_by_info (info);
+ struct gdbarch *new_gdbarch;
+
+ /* Check for the current file. */
+ if (info.abfd == NULL)
+ info.abfd = exec_bfd;
+ if (info.abfd == NULL)
+ info.abfd = core_bfd;
+
+ /* Check for the current target description. */
+ if (info.target_desc == NULL)
+ info.target_desc = target_current_description ();
+
+ new_gdbarch = gdbarch_find_by_info (info);
/* If there no architecture by that name, reject the request. */
if (new_gdbarch == NULL)
/* If it is the same old architecture, accept the request (but don't
swap anything). */
- if (new_gdbarch == current_gdbarch)
+ if (new_gdbarch == target_gdbarch ())
{
if (gdbarch_debug)
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
- "Architecture 0x%08lx (%s) unchanged\n",
- (long) new_gdbarch,
+ "Architecture %s (%s) unchanged\n",
+ host_address_to_string (new_gdbarch),
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
return 1;
}
/* It's a new architecture, swap it in. */
if (gdbarch_debug)
fprintf_unfiltered (gdb_stdlog, "gdbarch_update_p: "
- "New architecture 0x%08lx (%s) selected\n",
- (long) new_gdbarch,
+ "New architecture %s (%s) selected\n",
+ host_address_to_string (new_gdbarch),
gdbarch_bfd_arch_info (new_gdbarch)->printable_name);
- deprecated_current_gdbarch_select_hack (new_gdbarch);
+ set_target_gdbarch (new_gdbarch);
return 1;
}
struct gdbarch *
gdbarch_from_bfd (bfd *abfd)
{
- struct gdbarch *old_gdbarch = current_gdbarch;
- struct gdbarch *new_gdbarch;
struct gdbarch_info info;
-
gdbarch_info_init (&info);
+
info.abfd = abfd;
return gdbarch_find_by_info (info);
}
void
set_gdbarch_from_file (bfd *abfd)
{
+ struct gdbarch_info info;
struct gdbarch *gdbarch;
- gdbarch = gdbarch_from_bfd (abfd);
+ gdbarch_info_init (&info);
+ info.abfd = abfd;
+ info.target_desc = target_current_description ();
+ gdbarch = gdbarch_find_by_info (info);
+
if (gdbarch == NULL)
- error (_("Architecture of file not recognized.\n"));
- deprecated_current_gdbarch_select_hack (gdbarch);
+ error (_("Architecture of file not recognized."));
+ set_target_gdbarch (gdbarch);
}
/* Initialize the current architecture. Update the ``set
static const bfd_target *default_bfd_vec;
#endif
+static int default_byte_order = BFD_ENDIAN_UNKNOWN;
+
void
initialize_current_architecture (void)
{
const char **arches = gdbarch_printable_names ();
-
- /* determine a default architecture and byte order. */
struct gdbarch_info info;
+
+ /* determine a default architecture and byte order. */
gdbarch_info_init (&info);
- /* Find a default architecture. */
- if (info.bfd_arch_info == NULL
- && default_bfd_arch != NULL)
- info.bfd_arch_info = default_bfd_arch;
- if (info.bfd_arch_info == NULL)
+ /* Find a default architecture. */
+ if (default_bfd_arch == NULL)
{
/* Choose the architecture by taking the first one
- alphabetically. */
+ alphabetically. */
const char *chosen = arches[0];
const char **arch;
for (arch = arches; *arch != NULL; arch++)
if (chosen == NULL)
internal_error (__FILE__, __LINE__,
_("initialize_current_architecture: No arch"));
- info.bfd_arch_info = bfd_scan_arch (chosen);
- if (info.bfd_arch_info == NULL)
+ default_bfd_arch = bfd_scan_arch (chosen);
+ if (default_bfd_arch == NULL)
internal_error (__FILE__, __LINE__,
_("initialize_current_architecture: Arch not found"));
}
+ info.bfd_arch_info = default_bfd_arch;
+
/* Take several guesses at a byte order. */
- if (info.byte_order == BFD_ENDIAN_UNKNOWN
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN
&& default_bfd_vec != NULL)
{
- /* Extract BFD's default vector's byte order. */
+ /* Extract BFD's default vector's byte order. */
switch (default_bfd_vec->byteorder)
{
case BFD_ENDIAN_BIG:
- info.byte_order = BFD_ENDIAN_BIG;
+ default_byte_order = BFD_ENDIAN_BIG;
break;
case BFD_ENDIAN_LITTLE:
- info.byte_order = BFD_ENDIAN_LITTLE;
+ default_byte_order = BFD_ENDIAN_LITTLE;
break;
default:
break;
}
}
- if (info.byte_order == BFD_ENDIAN_UNKNOWN)
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN)
{
- /* look for ``*el-*'' in the target name. */
+ /* look for ``*el-*'' in the target name. */
const char *chp;
chp = strchr (target_name, '-');
if (chp != NULL
&& chp - 2 >= target_name
- && strncmp (chp - 2, "el", 2) == 0)
- info.byte_order = BFD_ENDIAN_LITTLE;
+ && startswith (chp - 2, "el"))
+ default_byte_order = BFD_ENDIAN_LITTLE;
}
- if (info.byte_order == BFD_ENDIAN_UNKNOWN)
+ if (default_byte_order == BFD_ENDIAN_UNKNOWN)
{
/* Wire it to big-endian!!! */
- info.byte_order = BFD_ENDIAN_BIG;
+ default_byte_order = BFD_ENDIAN_BIG;
}
+ info.byte_order = default_byte_order;
+ info.byte_order_for_code = info.byte_order;
+
if (! gdbarch_update_p (info))
internal_error (__FILE__, __LINE__,
_("initialize_current_architecture: Selection of "
"initial architecture failed"));
/* Create the ``set architecture'' command appending ``auto'' to the
- list of architectures. */
+ list of architectures. */
{
- struct cmd_list_element *c;
- /* Append ``auto''. */
+ /* Append ``auto''. */
int nr;
for (nr = 0; arches[nr] != NULL; nr++);
arches = xrealloc (arches, sizeof (char*) * (nr + 2));
arches[nr + 0] = "auto";
arches[nr + 1] = NULL;
- /* FIXME: add_set_enum_cmd() uses an array of ``char *'' instead
- of ``const char *''. We just happen to know that the casts are
- safe. */
- c = add_set_enum_cmd ("architecture", class_support,
- arches, &set_architecture_string,
+ add_setshow_enum_cmd ("architecture", class_support,
+ arches, &set_architecture_string,
_("Set architecture of target."),
- &setlist);
- set_cmd_sfunc (c, set_architecture);
+ _("Show architecture of target."), NULL,
+ set_architecture, show_architecture,
+ &setlist, &showlist);
add_alias_cmd ("processor", "architecture", class_support, 1, &setlist);
- /* Don't use set_from_show - need to print both auto/manual and
- current setting. */
- add_cmd ("architecture", class_support, show_architecture,
- _("Show the current target architecture"), &showlist);
}
}
{
memset (info, 0, sizeof (struct gdbarch_info));
info->byte_order = BFD_ENDIAN_UNKNOWN;
+ info->byte_order_for_code = info->byte_order;
info->osabi = GDB_OSABI_UNINITIALIZED;
}
/* Similar to init, but this time fill in the blanks. Information is
- obtained from the specified architecture, global "set ..." options,
- and explicitly initialized INFO fields. */
+ obtained from the global "set ..." options and explicitly
+ initialized INFO fields. */
void
-gdbarch_info_fill (struct gdbarch *gdbarch, struct gdbarch_info *info)
+gdbarch_info_fill (struct gdbarch_info *info)
{
/* "(gdb) set architecture ...". */
if (info->bfd_arch_info == NULL
- && !target_architecture_auto
- && gdbarch != NULL)
- info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch);
+ && target_architecture_user)
+ info->bfd_arch_info = target_architecture_user;
+ /* From the file. */
if (info->bfd_arch_info == NULL
&& info->abfd != NULL
&& bfd_get_arch (info->abfd) != bfd_arch_unknown
&& bfd_get_arch (info->abfd) != bfd_arch_obscure)
info->bfd_arch_info = bfd_get_arch_info (info->abfd);
- if (info->bfd_arch_info == NULL
- && gdbarch != NULL)
- info->bfd_arch_info = gdbarch_bfd_arch_info (gdbarch);
+ /* From the target. */
+ if (info->target_desc != NULL)
+ info->bfd_arch_info = choose_architecture_for_target
+ (info->target_desc, info->bfd_arch_info);
+ /* From the default. */
+ if (info->bfd_arch_info == NULL)
+ info->bfd_arch_info = default_bfd_arch;
/* "(gdb) set byte-order ...". */
if (info->byte_order == BFD_ENDIAN_UNKNOWN
- && !target_byte_order_auto
- && gdbarch != NULL)
- info->byte_order = gdbarch_byte_order (gdbarch);
+ && target_byte_order_user != BFD_ENDIAN_UNKNOWN)
+ info->byte_order = target_byte_order_user;
/* From the INFO struct. */
if (info->byte_order == BFD_ENDIAN_UNKNOWN
&& info->abfd != NULL)
info->byte_order = (bfd_big_endian (info->abfd) ? BFD_ENDIAN_BIG
- : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE
- : BFD_ENDIAN_UNKNOWN);
- /* From the current target. */
- if (info->byte_order == BFD_ENDIAN_UNKNOWN
- && gdbarch != NULL)
- info->byte_order = gdbarch_byte_order (gdbarch);
+ : bfd_little_endian (info->abfd) ? BFD_ENDIAN_LITTLE
+ : BFD_ENDIAN_UNKNOWN);
+ /* From the default. */
+ if (info->byte_order == BFD_ENDIAN_UNKNOWN)
+ info->byte_order = default_byte_order;
+ info->byte_order_for_code = info->byte_order;
/* "(gdb) set osabi ...". Handled by gdbarch_lookup_osabi. */
+ /* From the manual override, or from file. */
if (info->osabi == GDB_OSABI_UNINITIALIZED)
info->osabi = gdbarch_lookup_osabi (info->abfd);
- if (info->osabi == GDB_OSABI_UNINITIALIZED
- && gdbarch != NULL)
- info->osabi = gdbarch_osabi (gdbarch);
+ /* From the target. */
+ if (info->osabi == GDB_OSABI_UNKNOWN && info->target_desc != NULL)
+ info->osabi = tdesc_osabi (info->target_desc);
+ /* From the configured default. */
+#ifdef GDB_OSABI_DEFAULT
+ if (info->osabi == GDB_OSABI_UNKNOWN)
+ info->osabi = GDB_OSABI_DEFAULT;
+#endif
/* Must have at least filled in the architecture. */
gdb_assert (info->bfd_arch_info != NULL);
}
-/* */
+/* Return "current" architecture. If the target is running, this is
+ the architecture of the selected frame. Otherwise, the "current"
+ architecture defaults to the target architecture.
+
+ This function should normally be called solely by the command
+ interpreter routines to determine the architecture to execute a
+ command in. */
+struct gdbarch *
+get_current_arch (void)
+{
+ if (has_stack_frames ())
+ return get_frame_arch (get_selected_frame (NULL));
+ else
+ return target_gdbarch ();
+}
+
+int
+default_has_shared_address_space (struct gdbarch *gdbarch)
+{
+ /* Simply say no. In most unix-like targets each inferior/process
+ has its own address space. */
+ return 0;
+}
+
+int
+default_fast_tracepoint_valid_at (struct gdbarch *gdbarch,
+ CORE_ADDR addr, int *isize, char **msg)
+{
+ /* We don't know if maybe the target has some way to do fast
+ tracepoints that doesn't need gdbarch, so always say yes. */
+ if (msg)
+ *msg = NULL;
+ return 1;
+}
+
+void
+default_remote_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
+ int *kindptr)
+{
+ gdbarch_breakpoint_from_pc (gdbarch, pcptr, kindptr);
+}
+
+void
+default_gen_return_address (struct gdbarch *gdbarch,
+ struct agent_expr *ax, struct axs_value *value,
+ CORE_ADDR scope)
+{
+ error (_("This architecture has no method to collect a return address."));
+}
+
+int
+default_return_in_first_hidden_param_p (struct gdbarch *gdbarch,
+ struct type *type)
+{
+ /* Usually, the return value's address is stored the in the "first hidden"
+ parameter if the return value should be passed by reference, as
+ specified in ABI. */
+ return language_pass_by_reference (type);
+}
+
+int default_insn_is_call (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ return 0;
+}
+
+int default_insn_is_ret (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ return 0;
+}
+
+int default_insn_is_jump (struct gdbarch *gdbarch, CORE_ADDR addr)
+{
+ return 0;
+}
+
+void
+default_skip_permanent_breakpoint (struct regcache *regcache)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ CORE_ADDR current_pc = regcache_read_pc (regcache);
+ const gdb_byte *bp_insn;
+ int bp_len;
+
+ bp_insn = gdbarch_breakpoint_from_pc (gdbarch, ¤t_pc, &bp_len);
+ current_pc += bp_len;
+ regcache_write_pc (regcache, current_pc);
+}
+
+CORE_ADDR
+default_infcall_mmap (CORE_ADDR size, unsigned prot)
+{
+ error (_("This target does not support inferior memory allocation by mmap."));
+}
+
+void
+default_infcall_munmap (CORE_ADDR addr, CORE_ADDR size)
+{
+ /* Memory reserved by inferior mmap is kept leaked. */
+}
+
+/* -mcmodel=large is used so that no GOT (Global Offset Table) is needed to be
+ created in inferior memory by GDB (normally it is set by ld.so). */
+
+char *
+default_gcc_target_options (struct gdbarch *gdbarch)
+{
+ return xstrprintf ("-m%d%s", gdbarch_ptr_bit (gdbarch),
+ gdbarch_ptr_bit (gdbarch) == 64 ? " -mcmodel=large" : "");
+}
+
+/* gdbarch gnu_triplet_regexp method. */
+
+const char *
+default_gnu_triplet_regexp (struct gdbarch *gdbarch)
+{
+ return gdbarch_bfd_arch_info (gdbarch)->arch_name;
+}
-extern initialize_file_ftype _initialize_gdbarch_utils; /* -Wmissing-prototypes */
+/* -Wmissing-prototypes */
+extern initialize_file_ftype _initialize_gdbarch_utils;
void
_initialize_gdbarch_utils (void)
{
- struct cmd_list_element *c;
- c = add_set_enum_cmd ("endian", class_support,
- endian_enum, &set_endian_string,
+ add_setshow_enum_cmd ("endian", class_support,
+ endian_enum, &set_endian_string,
_("Set endianness of target."),
- &setlist);
- set_cmd_sfunc (c, set_endian);
- /* Don't use set_from_show - need to print both auto/manual and
- current setting. */
- add_cmd ("endian", class_support, show_endian,
- _("Show the current byte-order"), &showlist);
+ _("Show endianness of target."),
+ NULL, set_endian, show_endian,
+ &setlist, &showlist);
}
projects / deliverable / binutils-gdb.git / blobdiff